Monroe, Utah,Hydrothermal System: Results from Drilling o ...

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Monroe, Utah,Hydrothermal System: Results from Drilling o f Test Monroe, Utah,Hydrothermal System: Results from Drilling o f Test

Wells MC 1 and MC 2 Wells MC 1 and MC 2

D. S. Chapman University of Utah

Roger Harrison Terra Tek, Inc.

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Prepred for DEPAWTMEWT OF €NERGY Division of Geothermal Energy

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Monroe, Utah,Hydrothermal System:

Results from Drilling o f Test Wells MC 1 and MC 2

D. S. Chapman, University of Utah and Roger Harrison, Terra Tek, Inc.

October 1978

TABLE OF CONTENTS

Page

. . . . . . . . . . . . . . . . . . . . . . . . . 1.0 Introduction 1 2.0 Description of drilling operation . . . . . . . . . . . . . . 1

3.0 Results from test wells MC1 and MC2

3.1 Drilling logs . . . . . . . . . . . . . . . . . . . . . . (a) Well MC1 3 (b ) Well MC2 3 . . . . . . . . . . . . . . . . . . . . . .

3.2 Lithology . . . . . . . . . . . . . . . . . . . . . . (a) Well MC1 6 . . . . . . . . . . . . . . . . . . . . . . (b) Well MC2 7 4.0 Analysis of results

4.1 Comparison of temperature-depth profiles . . . . . . . . 12

4.2 Compilation of cross sections across the Monroe mound, dipole-dipole resistivity, gravity, magnetics, and heat flow interpretation . . . . . . . . . . . . . . . . . . . 12

4.3 Interpretation 20 . . . . . . . . . . . . . . . . . . . . . Appendix I - Drilling Costs 22

Appendix 11 - Survey of Well Locations . . . . . . . . . . . . . . 25 . . . . . . . . . . . . . . . . . . . .

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

1

1.0 Introduction

Following detailed geological (Parry et al., 1976; Miller, 1976) and

geophysical (Mase, Chapman, and Ward, 1978; Kilty, Mase, and Chapman, 1978)

studies of the Monroe, Utah hydrothermal system, a program of drilling two

intermediate depth test wells was undertaken.

well drilling were three-fold: (1) to obtain structural information bearing

on the poorly known dip of the Sevier Fault, (2) to obtain temperature infor-

mation below the shallow depths (approximately 300 ft.) sampled in the first

phase of exploration, and ( 3 ) to provide cased wells which could act as

monitor wells during the production phase of the project.

drilling was seen to be vital to the selection of a site for a production

well.

wells, designated MC1 and MC2, and offers interpretation of the hydrothermal

system which may be used as a basis for selecting production wells.

The objectives of the test

The test well

This report describes the results from the drilling of the two test

2.0 Drilling Program

The test holes designated MC1 and MC2 were drilled by Grimshaw Drilling

Inc. of Cedar City using a Franks 4000 Mud Rotory Drill Rig.

MC1: A 6 3/4" hole was drilled to 362 feet, 3" API 9 lb/ft casing

with the bottom 30 feet slotted was set to total depth and the casing annulus

gravel packed to within 50 feet of the surface. The remaining 50 feet was

grouted to the surface. The well was capped with a 3".valve.

Chip samples were collected at 10 foot intervals and a continuous log

o f mud return temperature and penetration rate was maintained.

log was obtained after the well had stabilized without mud circulation for

A temperature

2

12 hours when a t a depth of 260 feet .

logged due t o the presence of d r i l l i ng mud i n the bottom of the hole t h r o u g h

w h i c h the temperature sonde would no t penetrate.

The bottom 110 fee t could not be

Some l o s t circulation was experienced a t approximately 330 fee t and was

attr ibuted t o a sha t te r zone a t the alluvium-volcanics interface. A small

artesian head was noted on removal of the d r i l l i ng mud pressure d u r i n g clean-

o u t and development.

MC2: A 12 inch hole was dr i l led t o 100 fee t . Five 20 foo t welded

j o i n t sections of 8" water well casing (wall thickness 0.313 inches) was

grouted t o the surface.

A 12" 300 16. gate valve was instal led on the casing head for hole con-

tainment during d r i l l i ng . A 6 3/4" hole was dr i l led t o total depth of 825

feet .

log of mud return temperature and penetration ra te was maintained.

s ignif icant l o s t circulation zone was encountered a t approximately 760 f ee t

and was par t ia l ly plugged w i t h continued pumping of a heavy mud.

artesian flow was encountered when the hole was cleaned fo r logging.

s i l t i n g o f the bottom o f the hole was noted while running the logs and the

combination of the time required t o r u n the logs and an ensuing delay before

casing was r u n resulted i n the loss of the bottom 250 feet .

Ch ip samples were collected a t 10 f o o t intervals and a continuous

A

A moderate

Rapid

The d r i l l e r was directed t o r ed r i l l the bottom of the hole; however, he was

unable t o penetrate below about 620 f ee t due t o very r a p i d s i l t i n g and

consequent hole collapse.

s lot ted was run t o 620 feet .

200 f ee t of the surface.

A flange was welded t o the casing head and the well capped with a 3" value.

As a resu l t , 3" API casing w i t h the bottom 60 f ee t

The casing annulus was gravel packed t o w i t h i n

The remaining 200 f e e t was grouted t o the surface.

3

3.0 Results of Test Hole D r i l l i n g

3.1 D r i l l i n g Logs

a ) Well MC1: Temperature and na tura l gamma logs were obtained

f o r the completed hole while flowing a t ' a na tura l a r t e s i a n r a t e of

approximately 5 gallons/minute. The logs a r e reproduced below along w i t h

the d r i l l i n g r a t e

b ) Well

( f lowing) , na tu ra l

the d r i l l i n g r a t e

og f o r comparison.

MC2: MC2 was logged p r i o r t o completion. Temperature

g a m a , and caliper, logs a r e reproduced below along w i t h

og

6

3.2 Lithology

a ) Lithology of MC1

0 - 2' 2' - 7 '

7' - 10'

10' - 20'

20' - 30'

30' - 40'

40' - 50' 50' - 60'

60' - 70' 70' - 80'

S i n t e r mound

CLAY - Gray, green

CLAY w i t h rounded granules of a1 1 uvial material predominantly quartz l a t i t e .

CLAY w i t h rounded t o subangular granules of quartz l a t i t e alluvial material w i t h some crystals o f mica and quartz.

Subrounded to subangul a r granules of quartz 1 a t i t e alluvial material w i t h crys%als o f mica and quartz mixed w i t h clay.

Same as 20' - 30' w i t h the a d d i t i o n of angular flecks of altered quartz l a t i t e indicating the presence of cobbles or boulders of the said material.

Same as 30' - 40' w i t h diminishing amounts of clay.

Same as 40' - 50' w i t h l i t t l e clay and a noticeably smaller size fraction of quar%z l a t i t e grains.

Predominantly angular granules of quartz l a t i t e .

Same as 60' - 70' w i t h the inclusion of altered quartz l a t i t e - hematite stained.

7

80' - 90' Same as 70' - 80' w i t h increased amounts of hematite stained altered quartz l a t i t e and increased amounts of cl ay .

90' - 130' Same as 80' - 90' w i t h decreasing clay content and larger grain s ize w i t h increased d e p t h .

130' - 140' Much decreased grain s ize and re in t rodu t ion of clay.

140' - 150' Litt le clay, w i t h continued small s ize fraction of quartz l a t i t e and hematite stained altered material w i t h occasional quartz crystals.

150' - 170' Same as 140' - 150' w i t h increasing s ize fraction.

170' - 240' Larger granules quartz l a t i t e and altered quartz l a t i t e w i t h b l u b s of clay. Occasional flecks of rock w i t h indicate d r i l l i n g into boulders o r cobbles .

240' - 300' Same as 170' - 240' except a noticeable increase i n angular flecks of quartz l a t i t e indicating boulders; a1 so clay present.

300' - 310' Small pebbles of rounded quartz l a t i t e and considerable clay fraction.

310' - 330' Granules of angular-subrounded quartz l a t i t e w i t h d i m i n i s h i n q amounts of clay and increased amounts of rock

330' - 340' Small s tion of micas -

340' - 362' Same as

f l &ks . ze fract on of quartz l a t i t e and introduc- chlor i te as altered from feldspars and bed rock 333'.

330' - 340' w i t h larger and fresher flecks of bed rock, quartz l a t i t e porphyry, w i t h some rounded granules which are probably derived from above.

(b) Lithology Log MC2

0 - 10' Sand 1-2 mm subrounded to subangular grains of quartz, quartz l a t i t e , sinter, oxidized volcanics (green, red).

10' - 20' As above - higher % oxidized material.

20' - 30' 30' - 40' 40' - 50' 50' - 60'

60' - 70'

70' - 80'

80' - 90'

As f o r 0 - 10' i n t e r v a l + mica chips.

As for 0 - 10' i n t e r v a l .

Same composition a s above; 2mm size.

As for 40' - 50', mainly blue/grey a l t e r e d quartz l a t i t e .

As above, l a r g e r g r a i n s (between, 2 & 3 mm) blue/grey/ green.

Coarse a l l u v i a l g r a v e l s , subrounded 1-5 mm i n b lue c l a y matr ix . S o f t a l t e r e d volcanics blue/purple .

As above.

90' - 100' As above; subrounded t o subangular.

100' - 110' 1-10 mm qua r t z l a t i t e chips, angular t o subangular. Somewhat a l t e r e d . Probably i n boulder f i e l d . Minor amount of c l ay .

110' - 120' Predominantly angular qua r t z l a t i t e chips 1 mm i n size; fresh, blue/grey.

120' - 130' Extremely poor sample (mostly vege ta t ion from mud p i t ) ; appears t o be same a s f o r 110-120 i n t e r v a l .

130' - 140' Subrounded t o angular qua r t z l a t i t e ch ips , s l i g h t l y

In grave ls /boulders . a l t e r e d , <1-4 m size. Hematite-stained chips probably washed i n from above.

140' - 150' As above (no hematite).

150' - 160' As above, higher % l a r g e r chips, p u r p l e .

160' - 170' Subrounded qua r t z l a t i t e g r a i n s , predominately 1-2 mm size. Looks more like sand. Some c l ay .

170' - 180' Subrounded qua r t z 1at i te . in b lue c l a y matr ix .

180' - 190' As above (170-180) + free qua r t z chips (subrounded).

190' - 200' S l i g h t l y a l t e r e d qua r t z l a t i t e subrounded t o angular , 1-3 mm, very l i t t l e c l ay .

200' - 210' As above; no clay v i s i b l e .

210' - 220' As f o r 200' - 210' i n t e r v a l .

220' - 230' As for 200' - 210' i n t e r v a l ; max size 5 mm.

9

230' - 240' As above.

240' - 250' Quartz l a t i t e chips, subrounded t o subangular; <1-3 mm size, s l i gh t ly a l tered. Minor amount of quartz chips (subrounded) alone + some buff colored chips (sburounded, hard) - si 1 iceous ( ? ) ; slow d r i l l rate.

250' - 260' As above. Higher % "buff colored'' chips. Appear t o be par t of the quartz l a t i t e - recrystall ized? Possibly part of a s i l i c i f i e d breccia zone (one chip).

260' - 270' Quartz l a t i t e subangular t o rounded <1-5 mm. Some chips appear "frothy". rounded i n general. Minor amount o f clay.

Buff colored grains well Quartz l a t i t e s l igh t ly a l tered.

270' - 280' Quartz l a t i t e - subrounded t o subangular, <1-3 mm, s l igh t ly a l te red , i n blue/grey clay matrix. Rounded buff colored pebbles present.

280' - 290' Quartz l a t i t e chips - a l te red , <1-4mm. Some hematite stained subrounded t o subangular; rounded buff pebbles; angular f l a t dk c h i p s - s o f t enough t o be scratched by knife - crystal1 ine appearance; brown "talcose" clay (rounded) w/chlorite a1 teration. General a1 luvial material.

290' - 300' Quartz l a t i t e , subangular t o rounded; <1-5 mm. Altered. Some hematite-stained. Minor clay.

300' - 310' Predominantly quartz l a t i t e <1-5 mm, altered. Subangular t o subrounded. of agate(?) - white. Minor amounts o f lithologies as described i n 280' - 290' interval present. Some clay.

A few subangular chips

310' - 320' Quartz l a t i t e , subrounded - angular, 1-5 mm, a l tered (some chlorite a l terat ion) . Blue/grey color; no clay apparent.

Some hematite s ta in .

320' - 330' Predominantly quartz l a t i t e , seems t o be more highly al tered. larger pebbles); red/brown "clay" pebbles, rounded. (May be highly al tered volcanic grains.)

Subrounded-subangular, 1-5 mm (higher %

330' - 340' Quartz l a t i t e sands, 1-4 mm rounded - subangular; a l tered some red/brown clay present. grains most abundant.

340' - 350' As above, brownish t i n t due t o high % b r i t t l e clays (very slow d r i l l rate).

1 mm s i z e

10

350' - 360' As above - highly altered quartz l a t i t e , subrounded- subangular; brown/red clay.

360' - 370' Angular - subrounded altered quartz l a t i t e , 1-3 mm. Slow Some clay, b u t less t h a n previous intervals.

d r i 1 1 ra te - boul ders/gravel s . 370' - 380' As above - more subrounded grains. L i t t l e or no

clay. Some mica flecks present.

380' - 390' Composition as above; more angular chips - more clay.

390' - 400' Altered quartz l a t i t e , angular t o subrounded; <1-2 mm size.

400' - 410' Subrounded quartz l a t i t e sand (1-2 mm) i n brown/red clay matrix.

410' - 420' As above; some larger pebbles.

420' - 430' As above.

430' - 440' As above, hematite s t a i n i n g due to oxida t ion of

440' - 450' As above.

450' - 460' <1-3 mm subrounded quartz l a t i t e sands (a1 tered) . Water was added t o mud p i t here so not as much clay i n sample.

460' - 470' As above - <1-2 m, more clay present.

470' - 480' Subangular-subrounded quartz latite chips; <I-5 nun, altered. Much less clay.

480' - 490' Angular-subrounded quartz l a t i t e ; 1-5 mm. Appears s l igh t ly fresher than l a s t sample.

490' - 500' Quartz l a t i t e sands (subrounded) i n blue/purple clay matrix. Highly altered.

500' - 510' Predominantly subrounded quartz l a t i t e (other l ihtologies present) 1-5 mm; i n clay.

510' - 520' As above; larger gravels blue/grey clay (alteration of I a t i t e i t s e l f ? ) .

520' - 530' Subangular - subrounded highly altered quarts l a t i t e gravels (1-4 mm) i n clay as above.

530' - 560' As above.

560' - 570' As above, mainly subrounded pebbles i n clay.

some mineral (micas?).

More clay.

11

570' - 580' As above, mainly subrounded pebbles i n clay.

580' - 590' As for 570' - 580' interval , some pebbles up to 10 mm.

590' - 600' As for 580' - 590' interval.

600' - 610' Subrounded - subangular highly altered quartz l a t i t e <1-5 mm; less clay than previous 9 0 ' . Most grains a re subrounded.

610' - 620' Poor sample - as above, <1-3 mm; no clay.

620' - 630' As above.

630' - 640' As above + some clay.

640' - 650' Angular-subrounded al tered quartz l a t i t e , 1-2 mm chips. Some mica present; some green al terat ion product. No clay.

a l te red) ; no clay. 650' - 660' 1 mm angular-subangular quartz l a t i t e (blue/purple

660' - 682' As above.

682' - 700' Larger chips; same composition as above 1-3 mm; angular-subangular. Some mica. Brown/red a1 terat ion.

700' - 720' Larger chips; altered quartz l a t i t e ; 1-3 m, h i g h % bri t t le beig/grey colored clay (angular chips).

720' - 740' As above - quartz l a t i t e highly al tered. Grey + red/brown b r i t t l e clay. ( lost circulation zone)

than angular chips. Mica present. ( lost c i rculat ion)

740' - 760' As for 700'- 720' interval; less clay - more subrounded

760' - 780' As above, very l i t t l e clay.

780' - 790' Angular-subrounded highly altered quartz l a t i t e ; 1-4 mm. mica present.

Some dark brown b r i t t l e clay chips (angular);

790' - 800' As above - green a1 terat ion (1-2 mm chips).

800' - 820' Angular-subrounded quartz l a t i t e (highly a l te red) -

820'-825.5' As above.

No mica v i s i b l e.

most chips subangular, <1-2 mm. No clays.

. ....

12

4.0 Analysis of results

4.1 Comparison of temperature-depth profiles

Temperature profiles obtained in MC1 at several time intervals

during and after drilling are shown in Fig. 4.1.

was obtained after a weekend lapse in drilling with the well effectively

"shut in" by the weight of drilling mud.

after completion of the we1 1.

One temperature profile

The other profiles were obtained

The most important feature of Fig. 4.1 is the striking similarity

between the Monroe mound MC1 and the Red Hills RH4 (Fig. 4.2b) which are

in approximately the same position relative to the Sevier Fault and the tufa

mound. We deduce from this that the Monroe and Red Hill mounds have similar

thermal structure.

4.2 Compilation of cross sections across the Monroe mound

A compilation o f sections across the Monroe mound is shown in the

following figures:

cross-section at Monroe hot springs; Fig. 4.2(b) Temperature-depth curves

and temperature cross-section o f Red Hill hot spring; Fig. 4.2(c) Heat flow

cross section; Fig. 4.2(d) Dipole-dipole resistivity pseudo-section and

interpretation o f Monroe hot springs; Fig. 4.2(e) Gravity interpretation;

Fig. 4.2(f) Magnetics interpretation.

Fig. 4.2(a) Temperature-depth curves and temperature

0

20

40

h

E

E 60 Q w

Y

a

80

100

I20 2

I I I 1 I

5 0 60 70 80 30 4 0

A ' + o 1 I 1 I

A MC

0 MC

+ M C

A + 0 * A + o

A + o A +o

A e A ck

A oe A ot

A o+ o+ A

A ge A ' o+ A o+

m o+ A o+

o+ ot oe ot ot (3 (3 (3 c) Ok CB Q

0

CB

8) CB CB

9 / 17/76 Q

912 1/76 0

9/23/76 8

TEMPERATURE ( " C )

Figure 4 . 1

14

0-

20 - h

E

I Y

40-

W 0 -

60 -

a

80 -

IO

TEMPERATURE (OC) 20 30 40 50

. . 'V1

ETERS

\ \ \ ' M 3 M 6 \ M 4 \

DISTANCE (m)

Figure 4 .2 (a )

15

TEMPERATURE ("C)

-

2 0 -

2 40- I - I-

60-

-

n

RED HILL HOT SPRING

N I

IO 0 '

'\..4 f I00 I I

I I I I I

DISTANCE (m) SE NW RED HILL SPRING

-4

I

VERTICAL EXAGGERATION 2: I "1 RH 4 c 1004

I I I I I 1

Figure 4 . 2 ( b )

16

om

I

0

=-

J

W-

J

P

x h

\s

\

* \

$ \

I

0

0

0

m

0 0

0

0

0

d

0

0

rr)

0

0

cu

0 0

0

0 0

0

0

N

0

% 0 0

*

t- -.J 3

LL

a

w

>

W

cn LI 0

W

0

U

t- o

w a

- a

a

a

w

LL z

2

0

a

LL E

W

0 z

I- v)

-

n

Y

a

n

-

17

0

N

r

pc

-

t

-4

I. I

I

I I

0

0

0

0

0

sg

rn

O

S

18

z 2 3 f 5 - 3 i Ll 3

IJ E - J

c L C J

19

COMPUTED Q OBSERVED

- -150- . . S S - 2 4 0 -

oc3-210- a --

-330

2;-360

6 -390

-420

- I

w E

1 .a - SS CANYON

/

LEVEE

MZ / FLOOD BASIN

MAGNETIC ALLUVIUM .OOl c.g. 5-

i 3 BEDROCK .ooo c. g- 5.

U LI

a %I

ALLUVIUM > W ' AND/OR VOLCANICS Cnl

I

SURFA 1 .7 -

L Y

2 1 . 6 - 0

Y

- I- .oOl c.g. 1.

a I > MAGNETIC ALLUVIUM

W 2 1 . 5 - w

AND/OR VOLCANICS I

.ooo c.9. I.

I

NO VERTICAL EXAGGERATION 1.3

900 SOL 700 600 1400 1300 1235 11% m

L J C A T I3N(METERS)

Figure 4 . 2 ( f )

20

4 . 3 Interpretation

The f irst phase of geological and geophysical investigations

(Mas4e, Chapman, and Ward, 1978) resulted i n the following.conclusions about

the Monroe-Red Hills hydrothermal system: 1 ) The system is aligned nor th-

south along a prominent range f r o n t and i s apparently s t ructural ly control led

by the Sevier F a u l t Zone.

f i e s several of the da ta sets ; 2 ) the thermal structure can be effectively

modeled by assuming a discharge of hot water from a reservoir a t depth up

through the Sevier Fault Zone; 3) maximum temperatures of 78°C were

observed a t Red Hills.

predicted from water geothennometry b u t the depth a t which these higher

temperatures are achieved depends on levels of cold water mixing in the

A d i p of 80" k 10" for the Sevier F a u l t s a t i s -

Higher temperatures of 118°C for the reservoir were

system; 4) hot water presently discharges both t h r o u g h surface springs and

through leakage i n the alluvium. The discharge pattern i s revealed by the

res i s t iv i ty surveys and by heat flow measurement; 5) the to t a l conductive

p l u s convective heat loss i s 7.8 MW.

The second phase o f explorat ion, namely t h e d r i l l i n g o f two tes t wells

a t MC 1 and MC 2 described i n the resu l t s was designed t o determine ( a ) the

d i p of the Sevier Fault and (b) the intermediate depth, thermal and hydrologic

s t a t e of the system, thereby provid ing a bet ter rationale for s i t i n g a pro-

duction we1 1.

Intersection of more consolidated volcanic bedrock i n the d r i l l holes

was deduced from the d r i l l logs (dr i l l ing rate , cal iper , natural gamma;

reference section 3.1) and l i thologies (reference section 3.2) , although

changes i n the l a t t e r were subtle as expected. The d i p of the Sevier Faul t

Zone determined from encountering more consolidated volcanic bedrock a t

21

dep ths of 310 f t . i n MC 1 and 610 f t . in MC 2 is 67" f 3".

u t i l i zes the survey resul ts given i n Appendix 2 and assumes a f au l t trend

of N 10" W 5 10".

deduced from geophysical modeling and may indicate enecheloned fault ing.

T h i s value

The computed d i p of 67" i s shallower t h a n the d i p

Temperatures observed in MC 1 a f t e r completion of the hole and i n

MC 2 while the well was flowing indicate the central pa r t of the Monroe

system i s isothermal a t 74" C between depths of 50m (165 f t . ) and 250m

(820 f t . ) .

depth where cold water mixing may occur.

Significantly higher temperatures may be expected only below

Both MC 1 and MC 2 produced artesian flow t o the surface a f t e r they

were cleaned.

f low from MC 2 i s l ikely produced from the fracture within the volcanic

bedrock a t depths of 230111 and 238111, as the flow was diminished t o approxi-

mately 40 gallons per minute when the bottom 64m (210 f t . ) of the hole

si1 ted.

The major part of the approximately 200 gallons per minute

1.

2.

3 . .

4.

5.

6.

7,

_ _ _ _ . - . .. . .- . - .. ... . . . .. . .~ . .... . .. . . . .... . .

22

APPENDIX I

D r i l l i n g Costs

QUANT I TY AND UNIT UNIT P R I C E TOTAL

Mobi 1 i z a t i o n and Demobi l izat ion Lump Sum $ 1,500.00

Mc.1 - D r i l l nominal 6%" hole, run 3" casing, gravel pack annulus from bottom t o w i t h i n 60 ft. o f surface, group top 60 ft., i n s t a l l 3" i s o l a t i n g va l ve.

362 ft;. $12.50/ft. 4,500.00

Extra footage author ized by David Chapman

Clean o u t and develop hole Mc.1

Lump Sum 500.00

Location t o Locat ion move Lump Sum 500.00

MC2 - D r i l l 12" ho le t o 100 ft. , run and group 8" casing t o surface, i n s t a l l 8" containment valve.

100 ft. 25.OO/ft. 2,500.00

MC2 - D r i l l nominal 6%" hole t o 650 ft. run 3" casing, gravel pack from bottom t o wi th in 200 ft. o f surface, group t o 200 ft. , i n s t a l l 3" i s o l a t i n g valve.

650 ft. 12.50/ft. 8 , 125.00

Ext ra g rou t i ng approved by David Chapman 150 ft. 2. oo/ f t . 300.00

Clean o u t and develop hole MC.2 Lump Sum 1,200.00

23

QUANTITY AND UNIT UNIT PRICE TOTAL

8. .Casing Costs:

8" nominal western water well casing 100 ft. $ 3.85/ft. 385.00

1.80/ft. 1,980.00 3" nominal water well casing lloo ft. slots - 6 row 12 slots/ft. ( 2 " X4'' ) 80 ft. 2.40/ft. 192.00

9. Expendable items: 1,829.78

10. Less cost of Blow out protection included in item 6 but not provided by contractor ( 1,000.00) --------------

TOTAL DUE $22,511.78

24

Appendix I1

Survey o f Well Locations

0 2 c

Q,

8 2

0 0 e

0 0 n

0

E

/

0 0 0

t 0 0 9 0

TRACK lff HUB ON LlNZ

I

I Section Corner 1 T 2 5 S, R.3 W, Salt Lakq 8ose Meridian) EL,= S572.f IRofor@ncr E lovot fon)

10,000

9,900

9,800

9,700

r\) 9,600 ul

R f e r ces

Kilty, K. T . , Chapman, D. S. and Mase, C. W . , 1978. Aspects of forced con- Technical Report 78-1701. vective heat transfer i n geothermal systems.

a.6.4.1 DOE/DGE, Contract EG-78-C-07-1701, Univ. of Utah.

Mase, C. W . , Chapman, D. S., and Ward, S. H., 1978. Geophysical study of tne Monroe-Red ~ H i 11 geothermal system. Technical report DOE/DGE , .Contract 78-C-07-1701 , Univ. o f Utah.

Miller, C. D . , 1976. Alteration and geochemistry o f the Monroe KGRA.

Parry, W. T . , Benson, N. L. and Miller, C . D . , 1976.

Dept. of Geol. and Geoph. M.Sc. Thesis, Univ. o f Utah.

thermal a l terat ion a t selected Utah ho t springs. Contract GI-43741, Univ. o f Utah.

Geochemistry and hydro- Technical Report NSF,